Reamer



Aug; 14, 1923. 1,465,029-

F. w. sTRAEHLE BEAMER Filed April e, 192@V 2 sheets-sneet 1.

v Aug. 14, 1923.

F. W. STRAEHLE BEAMER Filed April 8 1920 2 Sheets-$11851: 2

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Patnted'Aug. 14, 1923.

UNITED STATES To all 'whom it may concern:

Be `it known that I, FREDERICK W. STRAEHLE, a citizen of the United States, residing at Cleveland, in the Vcounty of Cuyahoga and State of Ohio, have invented a., certain new and useful Improvement in lteamers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to boring tools and more particularly to tools of the type that are known to the trade as floating reamers. It isa general object of theinvention to provide a construction whereby the connection between the power-driven( shank or shaft and .the reamer may be' formed in 'close .proximity to the front or'cutting end of the latter, whereby the liability of the reamer to tilt or cramp in the bore, and thus wedge in the latter, isovercome. A further object ofthe invention is to provide means whereby the .blades may bel conveniently and effectively secured in place upon the reamer body; to provide means whereby the blades maybe conveniently adjusted to compensate for Wear; also to provide a simple and ef icient dust-excludin joint` between the oper.' ating shaft or shan and the reamer body. I secure these objects, and other and more limited objects which will appear hereinafter, in and `throu h the construction shown in the drawings orming a part hereof, wherein Fig. 1 represents a side elevation of the reamer and its operating shank; IFig. 2 a longitudinal Section through the said reamer, corresponding yto the line .2-2 of Fig. 3,a portionof one blade and a portion of the shank being shown in elevation;4 Fig. 0.a sectional view corresponding to the line 3-3 of Fig. 2'looking in the direction of the arrows; Fig. 4 a similar view corresponding to the line 4 4 of Fig. 2 and looking in the direction of the arrows; Fig. 5 a detail in perspect-iveofthe shank and the cooperating members for securing the `fioating connection between the said shank and the reamer body; and Fig. 6 a detail in perspective of one of the reamer blades and the block cooperating therewith for securing the former to the reamer body.

l Describing the various parts by reference characters, l denotes the reamer body, the said Qbodyv having a cylindrical bore 2 ex'- tending from the rear, end of the body toward the frontend thereof, Near `the V.front is a floating, drive plate i2.

PATENT oFFlcE.

Application filed April 8, 1920.' Serial N0. 372,131.

end of the body, this bore is enlarged, as shown at 3, to provide a cylindrical extension of the same and, at the extremeV front end of the body, the bore is still further enlarged, as indicated at a, to provide an annular recessed seat at the front of said body. Annular shoulders 5 and 6 are interi posed between the bore sections 2 and 3, and 3 and 4f, respectively.

Mounted in the bore sections 2 and 3 is the operating shaft or shank. This shaft or shank is indicated generally at 7, is provided with a cylindrical portion Swhich is loosely mounted within the bore section 2, and is provided at its fro-nt end with a cylindrical head 9 which is loosely mounted within the bore section 3. In ordinary practice, there will be'a clearance of about 1/64 inch between the portions 8 and 9 of the shank and the surrounding cylindrical walls of the bore sections 2 and 3, respectively, this clearance being suliicient, in most cases, to permit of the self-adjustment of the reamer within the work bore. y Y. The head) is provided at its front end with a pair of diametrically opposed-lugs l0, each lug being formed as a segment of a ring having its outer and inner surface concentric with the axis of the shank 7 Each lug 10 is slightly less than l5 degrees in angular extent and is provided with lateral faces 11 each in a plane of a radius drawn from the axis of the shank. i

Cooperating with the lugs or shoulders .l0 This plate is provided with a pair of .segmental projections 13 each having an outer cylindrical face 14: conoentricwith the axis, of theshank 7 and adapted, when applied to the head 9, to provide a clearance of approximately 1/64 inch with the bore section 3. Each of these projections 13 Ais preferably 90 degrees in angular extent andeach is provided with a pair of lateral. faces 15, each located in the plane of a radius drawn from'the axis of the said-shank. Thelateral faces 15 are connected by a pair of opposed cylindrical surfaces i2v concentric with the axis of the shank?. l i e, Y

In orderv to secure a driving connection between the shank 7, block y12, and the reamer body, I provide a plate 16 which lis adapted to be iitted within the recess 4 and to be secured to said body, the said plate being provided with a pair of lugs 1.7 .Co-

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driving `lugs 10. Each lug `17 `is provided with ar cylindricalsurface 18,--slightly-less `than 45 degrees in extent and each having lateral faces 19, each of saidiaces being in the plane of a radius'drawn from' the axis of the shank. The inner face 2O of each off these lugs is also cylindricalnand the lugs are preferably of the same thicknessas the lugs 10, providing a like clearance between the f outer andinner faces-thereof and Y the bore 'section 3 yand -thecylindrical -siir'l'ace-#lQAa olfA the block 12, respectively;

Theplate 1G issecured inplaceby means of boltsl 21 threadedinto 'suitable bores-122 in the reamer body.f The body of! each lb'olt isthreaded intoopposed sectional apertures 23'- and 24 provided respectively inthe outer cylindrical surface of the'fplatef16y and the adjacent portion of the rean'ier body,l each bo'lthaving ahead 25 adaptedlto beseated within cooperating sectionaly apertures 26 andl Q7 formed'in'the blockand the reamer b'ody, respectively.

By the? construction described, af particularly ellicicntloating connection is provided between theishank '7 and the reamerbody, at the fron-t or c'utting'end of the ream'er'. l By making' the"V projections'` 13 substantially' 9() degrees in'Y angular extent'and spacing these projections substantially 90 degrees apart, with al capacity for adj us'tnientbetween said projections'and therlugs' 10 and; 17, I am enabled to secure freedom of movement along kdiameters that are 90v degrees apart; also to obtain" all of the floating which is necessary for the successful operation of the rearner. y

kThe exterior of the rea-mer body is provided with inclined1 Slotted seats for the blades. One of these bladesv is indicated general-ly at 28 and1 is provided with the usual beveled cutting surface 29. Extend ing inwardly from this cutting surface is a clamping surface 30, thc' clamping surface', when the blade is assembled, extending radially with respectto the axis of the shank. Nearthc inner end of the blade, a ,shoulder 3:1 ist provided, the base of the blade being wider than the exterior portion thereof. The seating' surface Y32 of each blade is tapered, to cooperate with a corresponding tapered surface 32a in the seat, the seats being provided at theJ inner'ends of slots formed in the rfe'ainefrbody. The face 33l of each blade cooperatcs'with a face 34 of its seat', the saidV faces Aextending parallel withV a radius drawn from theV axis of the 'shank ,ad through and including the face 30 of the blade At one side ofthe blade-seating surface, there is a shallower seat having Va tapered inner surface 35, there being a shoulder 3c interposed ,between the surface 35 and ai@ Surface 32a. The shaufver seat is pr- 'vded with a lateral race 37 converging slightly toward the face 34, the projection of the lface 37l not intersecting-the axis of thev shank or shaft.

For the purpose of securing the blades in i place, I employ wedge. blocks, each indicatedI of a blade,y thereby to wedge the same against the face 34, 'the face 40 being preferably radial withresp'ect to lthe axisof the shank. The locking' or wedge plates are secured in'place byv meansof screws; indicatedat 41, thea-xls ov each screw being parallel with thev faces' 37an'd 39; By'this construction and arrangement of parts, the blades willb'e wedged to their seats by the action of the faces-40 against the-faces 30. Furthermore, the lock.. plates: may' beeasily disengaged by` removing'the screws 41 extendinginto the rea'rnerl body;

For the purpose off adjusting the blades tocompensate for wear, -I providcthe following construction: The-rear end of the reamer body islthrea'ded, as indicated at 42. Mounted upon this p'ortion'of'the body is ai ring, indicated' generally at 43'; This ring isv split, as indicated at 44, and is' adapted to be clamped upon the-threaded portion of thebody by meansof ay screw bolt 45 having itsends mounted inl recesses 46 provided within the ring. The` operating endv of the screw is mounted loosely in its ring" section, the other end being threaded into the opposite portion or section of thering; As` the blades become worn, the, ring 43 may be rotated, first slacking up onk the screw bolt 45, if necessary. The rotation of the ring forces the blades forwardly along their inclined seats; therebyspreading the blades radially. When the blades have been positione'd, the ring may be` locked in place by setting up on the screw 45".

In order toV prevent the access of dustV or any other' material` between the operating shank or shaft and the interior of the reamer body. I provide `a. flat ringv 47 adaptcdto fit closely about the cylindrical portion 8 oli said shank and to beara'gainst the rear end of the reamer body.,` This ring is secured in place by means of a spring-wire ring 48 mounted in an annular groove 49 in the shank in such proximity to the ring 47 that the ring 49, when snapped into place, will engage the former ring. y

.y vHaving thus described my invention, what jI claim is 1. Ina tool of theA character described, the combination of a revoluble body, One or more cutting members supported thereby, said `body' having a Vbore extending for.- wardly from the rear thereof and having an enlargement adjacent to the .front of Said body, a shaft or 'shank loosely mounted in said bore and having a head'loosely mounted l'lO i* a member secured to the front of said body and having apair of diametrically opposed projections adapted to enter such-enlargement, and a floating connecting member in said kenlargement and having projections adapted to be engaged by the before-mentioned projections.

2. In a tool of the character described, the combination of a revoluble body, one or more cutting members supported thereby, said body having a bore extending from the rear toward the front thereof and provided adjacent to the front of said body with an enlargement and with a recess beyond said enlargement, a shaft or shank loosely mounted in said bore and having ak head loosely mounted in said enlargement, said head being provided with a pair of diametrically opposed projections at the periphery thereof, said projections each being approximately in extent, a plate detachably secured within said recess and having a pair of diametrically opposed projections adapted to enter such enlargement, each of such projections being substantially 45 in extent, and a plate loosely mounted in such enlargement and having a pair of diametrically opposed projections each substantially 90 in extent and arranged to be interposed between the driving projections on the head of the shaft or shank and the projections on said plate.

3. In a tool of the character described, the combination of a revoluble body, one or more cutting members supported thereby, said body having a bore extending from the rear toward the front thereof and provided adjacent to the front of said body with an enlargement, a shaft or shank loosely mounted in said bore and having a head loosely mounted in said enlargement, said head being provided with a pair of diametrically opposed projections at the periphery thereof, said projections each being 4approximately 450 in extent, a plate secured to said head and having a pair of diametrically opposed projections adapted to enter such enlargement, each of such projections being substantially 450 in extent, and a plate loosely mounted in such enlargement and having a pair of diametrically opposed projections each substantially 90D in extent and arranged to be interposed between the dri-ving projections on the head of the shank or shaft and the projections on said plate.

4. 'In a tool of thecharacter described, the combination of a revoluble body, one or more cutting members ysupported thereby, said body beingr provided with a bore extending forwardly from` the rear end thereof, .with an enlargement in front of said bore` and with a recess beyond said enlargement, a shank or shaft loosely mounted'in saidbore and havinga head loosely mounted in such enlargement, the head being provided With a pair of diametrically Vopposed peripheral forwardly extending projections,v each projection being substantially 45 in extent and veach having lateral Afaces radialvv with respect to the axis of said shaft or shank, a plate detachably mounted within the said recess and having a pair of diametrically opposed projections adapted to enter such enlargement between the projections on such head,the projections on said plate being. substantially 45 in angular extent and each having lateral faces radial with respect to the axis of said shaft or shank, and an intermediate member loosely mounted in said enlargement, the said intermediate member having a pair of opposed projections each substantially 90 in angular extent and each having lateral faces substantially radial with respect to the axis of said shaft or shank.

5. A tool of the character described, comprising a revoluble body having a plurality of slots extending longitudinally thereof, each slot having spaced tapered bottom walls, a lateral wall extending outwardly from one of such bottoms walls nearly parallel with a radius drawn from the axis of said body, each slot also having a second lateral wall extending outwardly from the other bottom wall, parallel with a radius drawn from such axis, the first wall being shorter than the second Wall, a blade having a tapered seat adapted to cooperate with the lower bottom wall of'each slot and having a radial face adapted to bear against the first mentioned lateral wall of such slot and a face which is radial with respect to the axis of said body, each such blade having a shouldered portion projecting laterally from the inner end of the last mentioned face thereof, a clamping block for each blade, each block having a tapered innerface and opposed lateral faces, one of said lateral faces being adapted to engage the second lateral face of its slot and the other face being radial with respect to the axis of said body and adapted to engage the radial face of its blade outside the shouldered portion thereof, and means for connecting each block to said body.4

6. In a tool of the character'described,l

the combination of a revoluble body hav- ,ing a bore extending forwardly from the rear end thereof, a shaft or shank loosely mounted in said bore, a ring surrounding the said shaft or shank and adapted to engage the rear of said body, the said shaft or shank having a recess at the yrear of said ring, and a split resilient retaining ring mounted in said recess and adapted to engage thefirst mentioned ring.

7. In a tool of the character described,

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ein

the combination of av revoluble body have ing a bore extending forwardly-from the rear .end thereof, a shaft or shank loosely mounted in said bore, e ring surrounding the said shaftor shank and adapted to engage thexrear of seidV body, the Suid shaft or shank having a lrecess abt-hereof of said adapted to engage the rst mentioned ring. `f

In testimony whereof, I hereunto ax my signature.

FREDERICK W. STRAEHLE. 

